Voir la source de CCTV security camera lens calculator

2.8mm is wider than 4mm is wider than 6mm is wider than 12mm. If you want to protect a huge region to go wide. If want to zoom from a [http://www.iamsport.org/pg/bookmarks/riddle23female/read/29286827/onboard-video-surveillance-for-larger-community-transportation-system Onboard Online video Surveillance for More substantial General public Transportation Technique] distance then acquire a 50mm or 100mm lens.

Most common [http://www.dvrunlimited.com/lenses-1399684390 lens] people purchase two.8mm to 12mm if you want to cover a broad view. If you want to read through a license plate or entrance from a distance, 5mm to 50mm or 5mm to100mm will perform for you. LPR digicam already made read license plates

Underneath is a link for lens calculator, you can use this calculator to decide what type of lens will function the best for you. Following you have figured out what lens you require, you can acquire from us. If you are are nonetheless not able to choose what you want, you should drop us a line, 1 of our seasoned installers will propose you the [http://www.dvrunlimited.com/lenses-1399684390  appropriate product].